Physiological strain and countermeasures with firefighting

摘要: Protective clothing is integral to the task of firefighting, but at same time can increase physiological strain and impair work capacity. Encapsulation head high thermal resistance and/or low water vapor permeability ensemble impede evaporative heat dissipation, thus elevating rate storage creating a state uncompensable stress (UHS). In addition, additional weight from carrying supplemental air supply greater respiratory breathing through regulator create negative spiral hyperpnea demands metabolic production. The elevated also cardiac potentially risk for myocardial events. Tolerance during UHS determined by three factors: core temperature beginning exposure, that be tolerated before exhaustion or collapse ensues, in end exposure. often employed highly dynamic environments, making portability, longevity integration with requirements critical design characteristics countermeasures. To date, most countermeasures have been relatively indirect nature, primarily alterations scheduling along manipulations such as cooling recovery periods. Advances are required materials science develop lighter less restrictive protective equipment, concurrent strategies target specific regions which effectively implemented exercise.